com.adavr.player.globjects.Texture.java Source code

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Here is the source code for com.adavr.player.globjects.Texture.java

Source

/*
 * Copyright (C) 2015 Shotaro Uchida <fantom@xmaker.mx>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.adavr.player.globjects;

import de.matthiasmann.twl.utils.PNGDecoder;
import de.matthiasmann.twl.utils.PNGDecoder.Format;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;

/**
 *
 * @author Shotaro Uchida <fantom@xmaker.mx>
 */
public class Texture extends GLObject {

    private final int target;

    private Texture(int id, int target) {
        super(id);
        this.target = target;
    }

    public int getTarget() {
        return target;
    }

    public static void bind(Texture t) {
        GL11.glBindTexture(t.target, t.id);
    }

    @Override
    public void destroy() {
        GL11.glDeleteTextures(id);
    }

    public static Texture create(Image image) {
        return create(GL11.GL_RGBA, image.getWidth(), image.getHeight(), GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE,
                image.getFlippedBuffer());
    }

    public static Texture create(int internalFormat, int width, int height, int format, int type,
            ByteBuffer pixels) {
        int id = GL11.glGenTextures();
        int target = GL11.GL_TEXTURE_2D;

        GL11.glBindTexture(target, id);

        GL11.glTexImage2D(target, 0, internalFormat, width, height, 0, format, type, pixels);

        GL11.glTexParameteri(target, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
        GL11.glTexParameteri(target, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);

        GL11.glTexParameteri(target, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
        GL11.glTexParameteri(target, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);

        return new Texture(id, target);
    }

    public static Image loadPNG(File file) throws IOException {
        try (InputStream in = new FileInputStream(file)) {
            return loadPNG(in);
        } catch (IOException ex) {
            return null;
        }
    }

    public static Image loadPNG(InputStream in) throws IOException {
        PNGDecoder decoder = new PNGDecoder(in);
        Image image = new Image(decoder.getWidth(), decoder.getHeight());
        decoder.decode(image.buffer, decoder.getWidth() * 4, Format.RGBA);
        return image;
    }

    public static class Image {

        private final int width;
        private final int height;
        private final ByteBuffer buffer;

        public Image(int width, int height) {
            this.width = width;
            this.height = height;
            this.buffer = ByteBuffer.allocateDirect(4 * width * height);
            System.out.println("[Image] width=" + width + ", heigth=" + height);
        }

        public int getWidth() {
            return width;
        }

        public int getHeight() {
            return height;
        }

        public ByteBuffer getFlippedBuffer() {
            buffer.flip();
            return buffer;
        }
    }
}